Hello all,
i have been breaking my brain trying to get connection pooling, using
Tomcat 4.1.12's build in dbcp, with mySQL 3.23.
I have followed the instructions on the how this should be done, and I am
getting an exception when I try to get a connection .. (like many other
people it seems).. If anyone has solved this problem.. or has a link to a
forum where this problem is answered please let me know..
I have downloaded mysql-connector-java-2.0.14.zip
I unzipped it and copied :
* the contents of WEB-INF/lib to my lib folder
* contents of com to my WEB-INF/classes folder
* contents of org to my WEB-INF/classes folder (this *does* contain
org.gjt.mm.mysql.Driver)
This does not work. My jsp test code follows, and the Exception occurs on
getConnection()...
<%@ page language="java" import="java.sql.*, javax.sql.*, javax.naming.*"
errorPage="error.jsp" %>
<%
Context initContext = new InitialContext();
Context envContext = (Context)initContext.lookup("java:/comp/env");
DataSource ds = (DataSource)envContext.lookup("jdbc/mehdi");
Connection conn = ds.getConnection();
%>
Exception is
java.sql.SQLException: Cannot load JDBC driver class
'org.gjt.mm.mysql.Driver'
SERVER.XML
<Context path="/mysql" docBase="mysql" debug="0" reloadable="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_DBTest_log." suffix=".txt"
timestamp="true"/>
<Resource name="jdbc/mehdi"
auth="Container"
type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/mehdi">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<!-- Maximum number of dB connections in pool. Make sure you
configure your mysqld max_connections large enough to handle
all of your db connections. Set to 0 for no limit.
-->
<parameter>
<name>maxActive</name>
<value>100</value>
</parameter>
<!-- Maximum number of idle dB connections to retain in pool.
Set to 0 for no limit.
-->
<parameter>
<name>maxIdle</name>
<value>30</value>
</parameter>
<!-- Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.
-->
<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter>
<!-- MySQL dB username and password for dB connections -->
<parameter>
<name>username</name>
<value>mehdi</value>
</parameter>
<parameter>
<name>password</name>
<value>mypass</value>
</parameter>
<!-- Class name for mm.mysql JDBC driver -->
<parameter>
<name>driverClassName</name>
<value>org.gjt.mm.mysql.Driver</value>
</parameter>
<!-- The JDBC connection url for connecting to your MySQL dB.
The autoReconnect=true argument to the url makes sure that the
mm.mysql JDBC Driver will automatically reconnect if mysqld closed
the
connection. mysqld by default closes idle connections after 8
hours.
-->
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost:3306/mehdi?autoReconnect=true</value>
</parameter>
</ResourceParams>
</Context>
running out of time, and hair.
Thanks,
Med
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